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2004 GMC Sierra 2500 HD 6.6L Poor Idle Quality, Misfire
Truck makes loud knocking noise and puffs thick black smoke. Sounds like detonation knock. Used modis to manually shut down injectors found that when injector number 2 was disabled the knocking stopped and the smoking stopped. Checked wiring at FICM and a inje...
FIX posted 9/9/2011
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Message Closed w/FIX
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7 Replies Received
7 Replies Received
Related Documents & Media | VIN | 1GTHK23264 |
| Engine | 6.6 L / 8 cyl / DIESEL |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire |
| Occurs | Always, Idle |
Trouble Codes
| P1223 | Fuel Injector 1 Output Circuit Malfunction |
| P1226 | Fuel Injector 2 Output Circuit Malfunction |
| P1229 | Fuel Injector 3 Output Circuit Malfunction |
| P1232 | Fuel Injector 4 Output Circuit Malfunction |
| P1235 | Fuel Injector 5 Output Circuit Malfunction |
| P1241 | Throttle Valve Control Motor 1 Circuit Malfunction |
Message Closed w/FIX
Vehicle Data
2004 GMC Sierra 2500 HD
| VIN | 1GTHK23264 |
| Engine | 6.6 L / 8 cyl / DIESEL |
| Trans | 5-speed Automatic (Electronic) |
| Delivery | Fuel Injection |
| Emissions | OBD-II Compliant |
| Symptoms | Poor Idle Quality, Misfire |
| Occurs | Always, Idle |
Trouble Codes
| P1223 | Fuel Injector 1 Output Circuit Malfunction |
| P1226 | Fuel Injector 2 Output Circuit Malfunction |
| P1229 | Fuel Injector 3 Output Circuit Malfunction |
| P1232 | Fuel Injector 4 Output Circuit Malfunction |
| P1235 | Fuel Injector 5 Output Circuit Malfunction |
| P1241 | Throttle Valve Control Motor 1 Circuit Malfunction |
Video